Zobrazeno 1 - 10
of 22
pro vyhledávání: '"O. N. Ramesh"'
Publikováno v:
IUTAM Laminar-Turbulent Transition ISBN: 9783030679019
We study the linear spatio-temporal stability characteristics of inflectional and non-inflectional parallel flows and towards this consider separated boundary layer flow (SBLF), plane Couette-Poiseuille flow (CPF) and Falkner Skan flow with Favourabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11a8f20025259644ba3b5e4ae8e699a9
https://doi.org/10.1007/978-3-030-67902-6_38
https://doi.org/10.1007/978-3-030-67902-6_38
Autor:
Abhijit Mitra, O. N. Ramesh
Publikováno v:
AIAA Journal. 57:1400-1408
Laminar separation bubble bursting is a deleterious phenomenon resulting in a loss of lift and an increase of drag at relatively low Reynolds numbers. There are some criteria in vogue in the litera...
Autor:
Shivsai Ajit Dixit, O. N. Ramesh
Publikováno v:
Journal of Fluid Mechanics. 851
High Reynolds number is thought to be a fundamental condition essential for the occurrence of log scaling in turbulent boundary layers. However, while log variation of mean velocity is seen to occur at moderate Reynolds numbers in the traditional bou
Autor:
O. N. Ramesh, Shivsai Ajit Dixit
Publikováno v:
Journal of Fluid Mechanics. 737:329-348
Scaling of the streamwise velocity spectrum ${\phi }_{11} ({k}_{1} )$ in the so-called sink-flow turbulent boundary layer is investigated in this work. The present experiments show strong evidence for the ${ k}_{1}^{- 1} $ scaling i.e. ${\phi }_{11}
Autor:
Saurabh S. Patwardhan, O. N. Ramesh
Publikováno v:
IndraStra Global.
Direct numerical simulations of sink flow turbulent boundary layers are performed. These simulations have been performed at higher Reynolds numbers than the fairly recent experimental sink flow studies of Dixit and Ramesh (2008). The mean velocity pr
Autor:
O. N. Ramesh, Sourabh S. Diwan
Publikováno v:
Journal of Fluid Mechanics. 698:468-478
Laminar separation bubbles are thought to be highly non-parallel, and hence global stability studies start from this premise. However, experimentalists have always realized that the flow is more parallel than is commonly believed, for pressure-gradie
Autor:
O. N. Ramesh, Shivsai Ajit Dixit
Publikováno v:
Journal of Fluid Mechanics. 649:233-273
Aspects of large-scale organized structures in sink flow turbulent and reverse-transitional boundary layers are studied experimentally using hot-wire anemometry. Each of the present sink flow boundary layers is in a state of ‘perfect equilibrium’
Autor:
O. N. Ramesh, Sourabh S. Diwan
Publikováno v:
Journal of Fluid Mechanics. 629:263-298
This is an experimental and theoretical study of a laminar separation bubble and the associated linear stability mechanisms. Experiments were performed over a flat plate kept in a wind tunnel, with an imposed pressure gradient typical of an aerofoil
Autor:
A. N. Vishwanatha Rao, O. N. Ramesh
Publikováno v:
Sadhana. 32:43-49
In air-compression systems, instabilities occur during operation close to their peak pressure-rise capability. However, the peak efficiency of a compression system lies close to this region of instability. A surge is a violent mode of instability whe
Autor:
O. N. Ramesh, Abhijit Mitra
Publikováno v:
Fluid Mechanics and Its Applications ISBN: 9783319062594
Low Reynolds number airfoils are prone to be adversely affected by the presence of laminar separation bubbles (LSB). But at relatively high Reynolds number (based on the chord of the airfoil) in the range of 100,000–200,000, suppression of LSB, by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de0618f7353ac7dd58691770823119a4
https://doi.org/10.1007/978-3-319-06260-0_7
https://doi.org/10.1007/978-3-319-06260-0_7